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Discovered by Carolyn S. Shoemaker
Eugene Merle Shoemaker
Henry E. Holt
Discovery date October 18, 1987
1988 VII; 1996 S2
Orbital characteristics A
Epoch March 6, 2006
Aphelion 5.952 AU
Perihelion 3.068 AU
Semi-major axis 4.51 AU
Eccentricity 0.3197
Orbital period 9.579 a
Inclination 4.3555°
Jupiter MOID 0.153 AU (22,900,000 km)
Dimensions 4.6 km (B)[4]
Last perihelion January 10, 2017[1][2]
June 13, 2007
Next perihelion 2017-May-06? (A)[3]
2026-Jul-16 (old core)
2026-Jul-17 (B)
2027-Jan-10? (A)

128P/Shoemaker–Holt, also known as Shoemaker-Holt 1, is a periodic comet in the solar system. The comet passed close to Jupiter in 1982 and was discovered in 1987.

The nucleus was split into two pieces (A+B) during the 1997 apparition.[5] Fragment A was last observed in 1996 and only has a 79-day observation arc.[3] Fragment B is estimated to be 4.6 km in diameter.[4]


  1. ^ MPC
  2. ^ Syuichi Nakano (2006-09-30). "128P/Shoemaker-Holt 1 – B (NK 2190)". OAA Computing and Minor Planet Sections. Retrieved 2012-02-25. 
  3. ^ a b "JPL Small-Body Database Browser: 128P/Shoemaker-Holt 1-A" (last observation: 1996-12-04). Jet Propulsion Laboratory. Retrieved 2017-04-07. 
  4. ^ a b "JPL Small-Body Database Browser: 128P/Shoemaker-Holt 1-B". Jet Propulsion Laboratory. Retrieved 2017-04-08. 
  5. ^ Seiichi Yoshida (2008-08-10). "128P/Shoemaker-Holt 1". Seiichi Yoshida's Comet Catalog. Retrieved 2012-02-25. 

External links[edit]

Numbered comets
128P/Shoemaker–Holt Next